Berserker mode

This armor grants Guts incredible power and endurance, allowing him to fight with enhanced strength, speed, and durability.It also comes with a cost: the armor amplifies Guts' rage and aggression to dangerous levels, making him lose control over his mind and body. This armor pushes Guts' body beyond its natural limits, which can lead to severe injuries, broken bones, and damage to his internal organs. It also heightens his berserk rage, potentially leading him to attack anyone, friend or foe, while under its influence. The armor essentially brings out a primal, monstrous version of Guts, allowing him to survive battles that would otherwise be impossible.